.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #E6F7FF 0%, #E6F7FF 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow: hidden;
  }
  
  .login-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
  }
  
  .login-container::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite reverse;
  }
  
  @keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
  }
  
  .login-form-container {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 450px;
  }
  
  .login-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
  }
  
  .login-title {
    text-align: center;
    color: #333;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 30px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  .avatar-section {
    text-align: center;
    margin-bottom: 30px;
  }
  
  .avatar-container {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 15px;
    border: 4px solid #f0f0f0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  }
  
  .avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .upload-button {
    color: #1890ff;
    font-size: 14px;
    text-decoration: underline;
    padding: 0;
    height: auto;
    border: none;
    background: transparent;
  }
  
  .upload-button:hover {
    color: #40a9ff;
    text-decoration: underline;
  }
  
  .form {
    width: 100%;
  }
  
  .form-input {
    height: 48px;
    border-radius: 12px;
    border: 2px solid #f0f0f0;
    background: #fafafa;
    transition: all 0.3s ease;
  }
  
  .form-input:hover {
    border-color: #d9d9d9;
    background: white;
  }
  
  .form-input:focus,
  .form-input.ant-input-focused {
    border-color: #1890ff;
    background: white;
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
  }
  
  .form-input .ant-input-prefix {
    color: #999;
    margin-right: 8px;
  }
  
  .ant-form-item {
    margin-bottom: 20px;
  }
  
  .signup-button {
    width: 100%;
    height: 48px;
    border-radius: 12px;
    background: #1890ff;
    border: none;
    font-size: 16px;
    font-weight: 600;
    margin-top: 10px;
    transition: all 0.3s ease;
  }
  
  .signup-button:hover {
    background: #40a9ff;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(24, 144, 255, 0.3);
  }
  
  .signup-button:active {
    transform: translateY(0);
  }
  
  /* 响应式设计 */
  @media (max-width: 480px) {
    .login-form {
      padding: 30px 20px;
    }
    
    .login-title {
      font-size: 24px;
    }
    
    .avatar-container {
      width: 80px;
      height: 80px;
    }
  } 